Magnetic recording medium

Details Magnetic recording medium Magnetic recording medium

1988-08-08

1990-03-20

Thibodeau, Paul J.

Stock material or miscellaneous articles

Composite

Of polyamidoester

252 6254, 428694, 428900, G11B 574

Patent

active

049100890

ABSTRACT:
S/N characteristic and durability of recording medium e.g. video tape or magnetic disket are improved by using as bonding resin used in the magnetic paint to make the magnetic layer a polyester-based polyurethane having a number average molecular weight of 5,000-100,000 and containing at least two hydroxyl group and at least one sulfone bond therein, through improvement of dispersibility of fine magnetic powder in the magnetic paint.

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